Title :
Unstable charging of Al2O3 spacers at high electrical stress
Author :
Wouters, P.A.A.F. ; Pemen, A.J.M. ; Smulders, H.W.M.
Author_Institution :
Eindhoven Univ. of Technol., Netherlands
Abstract :
Partial discharge activity is measured at AC voltages close to breakdown of a 5 mm thick spacer. Patterns as a function of the phase angle of the applied voltage are observed which can be ascribed to charging processes on the insulator. Besides a stable regime of discharges, sudden changes in behaviour may also occur. These patterns often emerge as bursts (few seconds or minutes) after which they either quench or lead to a full breakdown
Keywords :
alumina; flashover; insulator testing; partial discharges; surface discharges; 5 mm; AC voltages; Al2O3; Al2O3 spacers; alumina insulators; applied voltage phase angle; breakdown; charging processes; high electrical stress; partial discharge activity; unstable charging; Artificial intelligence; Breakdown voltage; Electric breakdown; Geometry; Insulation; Partial discharge measurement; Partial discharges; Shape; Stress; Surface charging;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 1998. Proceedings ISDEIV. XVIIIth International Symposium on
Conference_Location :
Eindhoven
Print_ISBN :
0-7803-3953-3
DOI :
10.1109/DEIV.1998.740601
